CVE-2019-9495

Name	CVE-2019-9495
Description	The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1867-1, DSA-4430-1
Debian Bugs	926801

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
wpa (PTS)	jessie, jessie (lts)	2.3-1+deb8u15	fixed
	stretch (security)	2:2.4-1+deb9u9	fixed
	stretch (lts), stretch	2:2.4-1+deb9u11	fixed
	buster, buster (lts)	2:2.7+git20190128+0c1e29f-6+deb10u5	fixed
	buster (security)	2:2.7+git20190128+0c1e29f-6+deb10u4	fixed
	bullseye (security), bullseye	2:2.9.0-21+deb11u2	fixed
	bookworm (security), bookworm	2:2.10-12+deb12u2	fixed
	sid, trixie	2:2.10-22	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
wpa	source	wheezy	(unfixed)	end-of-life
wpa	source	jessie	2.3-1+deb8u8		DLA-1867-1
wpa	source	stretch	2:2.4-1+deb9u3		DSA-4430-1
wpa	source	(unstable)	2:2.7+git20190128+0c1e29f-4			926801

https://w1.fi/security/2019-2/eap-pwd-side-channel-attack.txt
Patches: https://w1.fi/security/2019-2/